Automobile exhaust lock



,May 25)v w23;- EAS-6,64@

- G. A. LOWRY ET Al. Y

AUTOMOBILE EXHAUST Loup Filed June 21, 1929 2 Sheets-Sheet 1 ATTOEYY AG5. A. LOWRY ET AL.

AUTOMOB/ILE EXHAUST LOCK Filed Ju-'ne 21, 1920 2 Sheets-Sheet 2 mi 650,965 ,4 aM/,ex NVENTOR T/wmwlow j A TORNEYS.

Patented May 29, `'139523.

pisani n rica,

k'GEORGIE A. LOWRY, OF INDIANAPOLIS, INDIANA, AND THOMAS K. LOWRY, OF y if' I' CHICAGO, ILLINOIS. l

AUTOMOBILE :EXHAUST` LOCK.

Application filed .Tune 21, 1920i' Serial No. 390,677.

all wiz-om. t may concern Be it known that we, GEORGE A. LowRY :and THOMAS K. LowRY, citizens of the United States, and residents of Indianapo- .lis and Chicago, respectively, counties of Marion and Cook and States of Indiana and llllinois, respectively, have invented ai cer- Ttain. new and useful Automobile Exhaust Lock; and we do hereby declare that the )following is a full, clear,'and exact descripltion thereof, reference being had to the accompanying drawings, in which like numerals refer to like parts. v

This invention relates to a look control idevice for locking the exhaust of any formy yof engine where lthe elimination' and discharge of the used forces are necessary for its operation.

Itv is` the object of this rinvention to' provide a thief proof locking mechanism for the exhaust of amotor which will withstand all tamperingr and vprevent the opening of the exhaust, when properly locked, except by removal or mutilation'.

One feature of the invention .lies in the construction of the connection between the exhaust' manifold and the locking mechanism, wherein the ordinary nut is replaced withl a smooth surface round nut which can not be removed with lthe ordinary wrench but only with large pipe tongs which could not be conveniently carried around. In addition to this precaution, a further safe guard is added by placing a set screw through the nutinto the manifold and cutting off the head, making it impossib-le to separate the ylocking'me-chanism from the manifold. y

Another feature is in the means for preventing the use of a hack saw for vcutting an lopening' between the manifold and: the lock for permitting the escape of the exhaust. This consists of a loosely mounted collar mounted between the nut and the locking mechanism, and looselymounted so that a saw cannot vwell be operated for cut- .ting through into the exhaust pipe.

Another feature of the invention `lies in the construction of the upright containing the valve stem and lock, whereby it is formed oflight tough `material and firmly welded to the `exhaust pipe sothat itcannot be broken off, but any mutilation thereof would effect its` bending which would obstruct the unlocking-ofl the valve. This upright is also perforated for cooling the lock and preventing its overheating. However, the lock will he heated toa high degree, so that it is essential that the key be removed after use for locking' or unlocking.

Still another' feature of the invention is the construction of the lock wherein it' is provided with twosets of tumblers so that the key can be removed when .it has made a quarter turn, the valve making only a quarter .turn to open or close. This has also been done by means of a Geneva movement on the end of the lock so that the key could make the complete turn and the valve only a quarter turn, thereby accomplishing the same result. In' the construction of this lock it is absolutely essential that the key be removed at each operation, otherwise the operator could not touch it. It is, therefore, preferable that two sets of tmnblers be provided wherein the key can e removed without the 'key being retained to open or close the lock. The full nature of this invention will'be understood from the yaccompanyingdrawings and the following description and claims. l

Fig. 1 is a side elevation ofa portion of a motor showing the position and side elevation ofthe locking mechanism. Fig. E?, is av central longitudinal cross section through the locking mechanism. Fig. 3 is a front elevation of the locking mechanism. Fig. l is a central vertical section through the tumbler cylinder ofthe lock. Fig. 5 is a section taken on the line 5-5 of Fig. 4 showing the cylinder in the unlocked position. Fig. 6 is a cross section through the tumbler cylinder showing it in locked posi-` tion with the key removed. Fig. 7 is the same as Fig. 6 showing the tumblerv in locked position after `a quarter turn with the key removed.

In the drawings there is shown a cvlinder block 10 provided with a spark plug li mounted'in the forward part of a .motor vehicle, having a dash l2`and a coil box 13.

4The steering post 14 is mounted in the forward part of the vehicle, and a foot board 15 yinc-lines upwardly in close proximity to the motor, all of which is of the ordinary;Y construction commonly used. Y

The motor is provided with an exhaust manifold 16 having a connection with the exhaust pipeV 17 immediately joining'the cyl- :1;15 ...in i'direct; engagementnvith :the manifoldv 16.

525 yrlllounted iin closevproximi Inforder that the smooth 'surfaceinut 19=inay be-screwed onto the end fof ythe emanifold, f1- th'erefis..a-setscre\v 21Aivhich may be engaged .for turning the nut and 'then screwed there- ...220 through into-engagementcwith the. endr'of the ...manifold for y. securely locking l said f nut 'in ..positi.on, after '-Which. theahead l ofl -theezset .serewcan'ibe cut offesov as tor-prevent the removalsof'the nut.

`tyf torthe-,nut "19 tl iere` y is a :buttery valve 22'Within the con. `:dui/0.18 `for openinglandclosingzfthe same,

A --preverrtedmvhen !it is; turned; toV v closed 'posistein ,23 extending-K.upwardlywins a( `protesting tube 24C. 'fFhe valve stem isprovidedy -vvithA a bifurcated end in Which a loclrfstemfQ en# ygages for .turning land operating said1 stein '1535. and` value 22, For protectingsaidg valvestem fand` lock from manipulation;1a perforated Y upright housing 26 is mounted and securely mveldedfto the conduit 18 andis formedprefvonly cause -it toVy bench-#thereby :ffurther pre- V-.ve nting thefvalve `front#being turned. The perfonations 27';-are,-provided for ,air .cooling the -locking:mechanism which will: be .heated 45 toa a high degree by. the. exhaust gases.

4lThe locking mechanism and-housing extend gdi-rectly upward lfrom the conduit 118 through.. the footfboard 1,6 so-:nasi to permit the lock to .be lreadily @accessible from .the

50 driving seat. Irl-.order vtopreventthelheat .from f bengftransrnitted through the `hous- ,ing tofithe v'foet board, an" open vspace 28 isl provided therein about fthe --housing ,andicoveredfby a metal lflanged fitting 29,

,155 supportelover theifoot boardfby anfasbestos gasket 80, and@clbsedybyaa.hinged cap 81.

Inordereto protect-thefpipe-181from being out into `,by ,aha-ek sa-W so :as to f provide fxan 1voutlet @or escape for the exhaust'V gases'fand w50 therebyavoidingthelocfkfaloose.collarBQ .;provided, loosely mounted 0n the pipe 7^11S and covering Athe @entire space between vlthe lnut,19. and the'.-upright-:housing.26,150 loosely .-npiounted that it will vturn and vgive-f-with the flar 'cutting instrument. fAsv thek saw-@cannot veell'be operatedon adoose'bbject,'said collarivill not only be extremely difficult tolcut,

Vbut Wilt afford. additional` protectionto the 'pipe .118. for preventing the lmutilation there- IThis necessitates lv-thefreinoval ofthekey from thelock',ve as "if it is left "thereinit- Will-become v'a-.lve- 'onlyl makesi al quarter'tinn "to iopen or close, it `is necessarytof'provide av special. Flock with? two sets fof-2 itumblers so? 'that the lreyl can be removed-When'it has made aiquar- ,y ter' turn. v:"It being absolutely essentialthat'i'55 the Ikeyi be ffremovedw'th each-operatioiu this mechanism. v I A l 1 From'the foregoing 'it Willlbef understood y that 'theloclingl mechanism@ as hereinA de-'i190 scribed, .fis proof '1^ against *being removed,

i againstb'eingbut into" on mutilated between the manifold and the valve anchalsofA against r the lock itself being itainperedvvitlif'or broken tion. fThe-valve' 22de operated `by -a .valve can,"unloclrortbreakginto the exhaust pipe aswonee'm loekediandl the keyfremoved Y The lodging-meenemen.'which wierpen/law of theffremoval oftthe lk'eymuponfia quarterloo l l -Which a Skey'36=y extends-"for" '.e'irgagingthe erably ,of light. mate-rial z-sotha-teit cannot be :14,0 broken offandtany vforcedappliedtm :it will tumblers 37 gwhichseatfinthe recesses if they Ykeyso asto `lie-1 flushfvvith thefffadj acentsur- "105 face of the `cylinder 35.' and the r 4'bolt'138,* the Ybolt-'38 .extending .centrally through the 1 cylyinder @35W and having *secured r thereto the -tains ag plurality of tumblers fZ-Z'forming'fne set vertically aligned therein, and'the eylin- "pression springs'y 4:1wsothati'whenthe removed Athe fsprings 1411 'fvvilliforcetl gered() lforwardly soz-that'fthey vvill leflbethat.,thel plungersrandtumbiersnvill"wgster l doelt,"theretoreqwrmtsitheremoval To key and the locking of the device upon a quarter turn instead of the full and complete turn as is commonly necessary.

The invention claimed is z.

l. A locking device for' a conduit, having a valve mounted therein, means for opening and closing said valve and locking it in position, means for connecting said locking device with the conduit, and an annular sleeve loosely mounted thereon between said connecting means and valve for protecting said locking means against being engaged by a cutting tool. n

2. A locking device for a conduit, having a valve mounted therein, means for opening f and closing said valve and locking it in position, and a metal housing firmly secured to and enclosing said locking device for preventing the tampering therewith, said housing being of less strength than its connec tion with said locking device so as to cause it to bend rather than break off. y

3. A locking device for a conduit, having a valve mounted in said locking device, means for openingy and closing said valve and locking it in position, and a metal housing rfirmly secured to and enclosingA said locking device for therewith, said housing being of less strength than its connection with said locking device so Vas to cause it to bend rather than break olf, and having a plurality of perforations for permitting the radiation of heat therefrom.

4. A locking device for a conduit, having a valve mounted in said locking device, means for opening and closing said valve and locking it in position, an annular nut mounted on said locking device for connecting it with said conduit, means for locking said nut on said conduit, an annular sleeve loosely mounted on said locking device between said nut and valve for protecting it against being engaged by a cutting tool, and a perforated housing securely fixed to said locking device for protecting said opening and closing means against mutilation and permitting the cooling thereof, substantially as described.

In witness whereof, we have hereunto affixed our signatures.

GEORGE AQLOWRY. THOMAS K. LOVVRY.

preventing the tampering l 

